Parse txt file using Twig

Question

I am using Symfony2 with twig in it and I have large files (>100MB), which I want to parse and write some information from it into the HTML page. If I use my own Twig extension I get a memory exhaustion error. So is there a way to parse txt file straight from the twig file?

small file example:

1
003.00 001.00 
000.00 005.00 

result in HTML:

3+x+5xy

Answer 1

How about creating a custom extension and using a generator? (http://php.net/manual/en/language.generators.overview.php)